What can sharks teach us about our hearts?
This time of year, it's hard to escape sharks—on TV at least. But perhaps that heartbeat-like theme from "Jaws"—da-dum, da-dum—has you wondering, "What might I learn about my own heart from a shark?"
This time of year, it's hard to escape sharks—on TV at least. But perhaps that heartbeat-like theme from "Jaws"—da-dum, da-dum—has you wondering, "What might I learn about my own heart from a shark?"
Plants & Animals
Jul 9, 2024
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Saving lives through surgery is no longer exclusive to humans. In a study published July 2 in the journal Current Biology, scientists detail how Florida carpenter ants, a common, brown species native to its namesake, selectively ...
Plants & Animals
Jul 2, 2024
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37
Even if two molecules have the exact same chemical formula and the same number and types of bonds, their three-dimensional arrangements can still be different. While some people might mistakenly disregard this as a minor ...
Biochemistry
Jul 1, 2024
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The 2024 election has seen party leaders strain to present themselves as being in touch with the struggles ordinary people are facing in the cost of living crisis. And yet they don't appear to be convincing anyone.
Political science
Jul 1, 2024
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If there's one thing Australia is famous for it's wanting to kill you. Sharks in the ocean, crocs in the river and the sun trying to grill you like a scotch filet.
Ecology
Jun 29, 2024
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Work is underway on a wiring diagram of the motor circuits in the central nervous system that control muscles in fruit flies. This connectome, as the wiring diagram is called, is already providing detailed information on ...
Molecular & Computational biology
Jun 26, 2024
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A question left unanswered in a biologist's lab notebook for 40 years has finally been explained, thanks to a little fish that couldn't wriggle its tail.
Cell & Microbiology
Jun 26, 2024
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Scientists at the University of Washington and Harvard Medical School, in collaboration with the ESRF, have discovered the neural circuits that coordinate leg and wing movements in the fruit fly (Drosophila). This could lead ...
Molecular & Computational biology
Jun 26, 2024
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Transferring mitochondria from a patient's healthy skeletal muscle to damaged, ischemic heart tissue has been shown to restore heart muscle, increase energy production, and improve ventricular function.
Cell & Microbiology
Jun 26, 2024
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8
Soaring birds—like osprey, eagles, falcons, even vultures—can stay aloft in the air seemingly forever, rarely flapping their wings. They glide along rising air currents in a way that has fascinated humans and scientists ...
Plants & Animals
Jun 12, 2024
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Muscle (from Latin musculus, diminutive of mus "mouse") is the contractile tissue of the body and is derived from the mesodermal layer of embryonic germ cells. Muscle cells contain contractile filaments that move past each other and change the size of the cell. They are classified as skeletal, cardiac, or smooth muscles. Their function is to produce force and cause motion. Muscles can cause either locomotion of the organism itself or movement of internal organs. Cardiac and smooth muscle contraction occurs without conscious thought and is necessary for survival. Examples are the contraction of the heart and peristalsis which pushes food through the digestive system. Voluntary contraction of the skeletal muscles is used to move the body and can be finely controlled. Examples are movements of the eye, or gross movements like the quadriceps muscle of the thigh. There are two broad types of voluntary muscle fibers: slow twitch and fast twitch. Slow twitch fibers contract for long periods of time but with little force while fast twitch fibers contract quickly and powerfully but fatigue very rapidly.
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